摘要
水轮机流道内的三维粘性流数值计算模型是建立在雷诺平均的Ｎａｖｉｅｒ － Ｓｔｏｋｅｓ 方程的基础上，采用ｋ － ε紊流模型封闭方程，进行贴体坐标变换以提高计算精度．用有限体积法在非交错网格上对方程进行离散，对贴体坐标系中控制界面上的速度进行特殊加权处理。
Numerical simulation model of the three-dimensional viscous flow in the passage of hydraulic turbine is based on the Reynolds-averaged Navier-stokes equations closed with the standard model of turbulence k-ε. In order to increase calculation accuracy, the body-fitted curvilinear coordinate transformation is adopted. The governing equations are discretizated with non-staggered grid by means of finite volume method. The pressure oscillation is solved by a special averaging procedure of contravariant velocity components on control volume faces.
基金
云南省应用基础研究基金
关键词
三维
粘性流
紊流模型
水轮机
流道
数值计算
three-dimensional viscous flow
model of turbulence
finite volume method
non-staggered grid
